Built the first rev 3 board

Firmware/MacroPad_Rev3_Ver1/README.md

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+# MacroPad Rev 3 Ver 1 Firmware
+
+This is the first version of the firmware for the MacroPad Project. This firmware works specifically with the Rev. 3 board. It's pretty basic, one keymap, one layout, letters A through P, and the LEDs to a basic rainbow effect.
+
+From this starting point more advanced firmwares can be developed. Hopefully I'll get around to that someday...
+
+## Keymaps
+**Default** - July 2025
+Just the characters A through P, nothing special.

Firmware/MacroPad_Rev3_Ver1/keyboard.json

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+{
+    "manufacturer": "Molly Zaugg",
+    "keyboard_name": "macropad6",
+    "maintainer": "Molly Zaugg",
+    "bootloader": "atmel-dfu",
+    "diode_direction": "ROW2COL",
+    "features": {
+        "bootmagic": true,
+        "mousekey": false,
+        "extrakey": false,
+        "console": false,
+        "command": false,
+        "nkro": false,
+        "backlight": false,
+        "rgblight": true,
+        "rgbmatrix": false,
+        "audio": false,
+        "key_lock": false
+    },
+    "rgblight": {
+        "led_count": 16,
+        "hue_steps": 8,
+        "saturation_steps": 8,
+        "brightness_steps": 8,
+        "max_brightness": 100,
+        "sleep": false,
+        "driver": "ws2812",
+        "animations": {
+            "rainbow_mood": true,
+            "static_light": true
+        },
+        "default": {
+            "animation": "rainbow_mood",
+            "on": true,
+            "hue": 20,
+            "sat": 255,
+            "val": 255,
+            "speed": 1
+        },
+    },
+    "ws2812": {
+        "pin": "C6"
+    },
+    "matrix_pins": {
+        "cols": ["E2","B6","B5","B4"],
+        "rows": ["D3","D2","D1","D0"]
+    },
+    "processor": "atmega32u4",
+    "url": "",
+    "usb": {
+        "device_version": "1.0.0",
+        "pid": "0x0000",
+        "vid": "0xFEED"
+    },
+    "layouts": {
+        "LAYOUT_all": {
+            "layout": [
+                {"matrix": [0, 0], "x": 0, "y": 0},
+                {"matrix": [0, 1], "x": 1, "y": 0},
+                {"matrix": [0, 2], "x": 2, "y": 0},
+                {"matrix": [0, 3], "x": 3, "y": 0},
+                {"matrix": [1, 0], "x": 0, "y": 1},
+                {"matrix": [1, 1], "x": 1, "y": 1},
+                {"matrix": [1, 2], "x": 2, "y": 1},
+                {"matrix": [1, 3], "x": 3, "y": 1},
+                {"matrix": [2, 0], "x": 0, "y": 2},
+                {"matrix": [2, 1], "x": 1, "y": 2},
+                {"matrix": [2, 2], "x": 2, "y": 2},
+                {"matrix": [2, 3], "x": 3, "y": 2},
+                {"matrix": [3, 0], "x": 0, "y": 3},
+                {"matrix": [3, 1], "x": 1, "y": 3},
+                {"matrix": [3, 2], "x": 2, "y": 3},
+                {"matrix": [3, 3], "x": 3, "y": 3}
+
+            ]
+        }
+    }
+}

Firmware/MacroPad_Rev3_Ver1/keymaps/default/keymap.c

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+// Copyright 2023 QMK
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+    [0] = LAYOUT_all(
+        KC_A,   KC_B,   KC_C,   KC_D,
+        KC_E,   KC_F,   KC_G,   KC_H,
+        KC_I,   KC_J,   KC_K,   KC_L,
+        KC_M,   KC_N,   KC_O,   KC_P)
+};